Actually, Diesel Sweeties sort of explains it. As usual, Kris was ahead of his time (about four days ahead of his time, but still).

Incidentally, that comic that Kris linked to. Would it have been funny with Hitler? No, it wouldn't have--not even the nervous kind of funny. Would it have been funny in 1945 with Hitler? I don't know. Why is Milosevic funny in a way Hitler isn't?
This bothers me.

When this came up earlier between Sumana and myself, Sumana suggested that we are socialized to think that Hitler was qualitatively more evil than anyone else. Possibly the only Hitler jokes we find funny in this postmodern age are the ones that use him as a symbol of pure evil trapped within the body of a historical figure (which is what happened in CN, and what happens in DS and most of the comics linked to by it). In wartime it was different, as this cartoon reminds us--it was funny just to whomp on Hitler. I'm overanalyzing here.